defogger
/diːˈfɑːɡər/
noun
- A device or system that removes fog or condensation from a surface, especially a car's windshield or rear window.
- I turned on the car's rear defogger to clear the frost from the back window.
- The windshield defogger worked quickly, making the morning drive much safer.
- Many modern cars come with a built-in defogger for the side mirrors.